#include"mymath.h"


int add(int x, int y)
{
	return x + y;
}

int sub(int x, int y)
{
	return x - y;
}

int mul(int x, int y)
{
	return x * y;
}

int myerror = 0;

int div(int x, int y)
{
	if(y == 0)
	{
		myerror = 1;
		return -1;
	}
	return x / y;
}
